set(Multigrid_Files
  Multigrid/PossionOP.h
  Multigrid/BottomSolver.h
  Multigrid/Restriction.h
  Multigrid/Interpolation.h
  Multigrid/Multigrid.h
  Multigrid/MGFactory.h
  Multigrid/TestMultigrid.h
    PARENT_SCOPE
)
